{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,1]],"date-time":"2026-09-01T15:23:44Z","timestamp":1788276224780,"version":"build-2803163510"},"reference-count":12,"publisher":"Wiley","issue":"10","license":[{"start":{"date-parts":[[2026,6,28]],"date-time":"2026-06-28T00:00:00Z","timestamp":1782604800000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0\/"},{"start":{"date-parts":[[2026,6,28]],"date-time":"2026-06-28T00:00:00Z","timestamp":1782604800000},"content-version":"tdm","delay-in-days":0,"URL":"http:\/\/doi.wiley.com\/10.1002\/tdm_license_1.1"}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Diagnostic Cytopathology"],"published-print":{"date-parts":[[2026,10]]},"abstract":"<jats:title>ABSTRACT<\/jats:title>\n                  <jats:p>Nephrogenic adenoma (NA) is a benign lesion of the genitourinary tract that may mimic malignancy both clinically and histologically. The fibromyxoid variant (FMNA), characterized by spindled cells in myxoid stroma, presents additional diagnostic challenges due to its rarity and overlapping features with renal cell carcinoma (RCC). A 72\u2010year\u2010old man with a history of nephrolithiasis and no prior urologic surgery was evaluated for a right renal mass. Fine\u2010needle aspiration yielded cloudy red fluid with scant epithelial cells and a fibromyxoid background. Immunohistochemistry showed positivity for PAX8, AMACR, CK7, and CA\u2010IX, leading to a pre\u2010operative diagnosis of RCC. Partial nephrectomy revealed a unilocular cyst with a solid component. Histology demonstrated fibromyxoid stroma with embedded spindled cells and focal tubular NA features; therefore, a final diagnosis of fibromyxoid nephrogenic adenoma was rendered. Fibromyxoid nephrogenic adenoma is a benign entity that can closely mimic RCC on cytologic and immunohistochemical grounds. Our findings underscore the diagnostic pitfalls in small\u2010volume cytologic samples. Awareness of the cytologic features of FMNA and cautious interpretation of immunostains are essential to avoid misdiagnosis and unnecessary treatment.<\/jats:p>","DOI":"10.1002\/dc.70167","type":"journal-article","created":{"date-parts":[[2026,6,29]],"date-time":"2026-06-29T03:56:37Z","timestamp":1782705397000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Fibromyxoid Nephrogenic Adenoma Mimicking Renal Cell Carcinoma: A Diagnostic Pitfall in Fine\u2010Needle Aspiration Cytology"],"prefix":"10.1002","volume":"54","author":[{"ORCID":"https:\/\/orcid.org\/0009-0006-7078-5861","authenticated-orcid":false,"given":"Jodi","family":"Gedallovich","sequence":"first","affiliation":[{"name":"Department of Pathology Stanford University School of Medicine  Stanford California USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0009-0004-1266-336X","authenticated-orcid":false,"given":"Adebola","family":"Adeniyi","sequence":"additional","affiliation":[{"name":"Department of Pathology Stanford University School of Medicine  Stanford California USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0009-0007-7233-2361","authenticated-orcid":false,"given":"Ankur R.","family":"Sangoi","sequence":"additional","affiliation":[{"name":"Department of Pathology Stanford University School of Medicine  Stanford California USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-8241-5976","authenticated-orcid":false,"given":"Xiaohua","family":"Qian","sequence":"additional","affiliation":[{"name":"Department of Pathology Stanford University School of Medicine  Stanford California USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0009-0002-8262-4644","authenticated-orcid":false,"given":"Kelly","family":"Ernst","sequence":"additional","affiliation":[{"name":"Department of Pathology Stanford University School of Medicine  Stanford California USA"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2026,6,28]]},"reference":[{"key":"e_1_2_7_2_1","doi-asserted-by":"publisher","DOI":"10.1056\/NEJMoa013413"},{"key":"e_1_2_7_3_1","doi-asserted-by":"publisher","DOI":"10.1097\/PAS.0b013e31802e290d"},{"key":"e_1_2_7_4_1","doi-asserted-by":"publisher","DOI":"10.1097\/PAS.0000000000001986"},{"key":"e_1_2_7_5_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.prp.2015.09.013"},{"key":"e_1_2_7_6_1","doi-asserted-by":"publisher","DOI":"10.1089\/cren.2018.0037"},{"key":"e_1_2_7_7_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.anndiagpath.2018.09.012"},{"key":"e_1_2_7_8_1","doi-asserted-by":"publisher","DOI":"10.1097\/MD.0000000000027025"},{"key":"e_1_2_7_9_1","doi-asserted-by":"publisher","DOI":"10.4161\/cc.3.2.618"},{"key":"e_1_2_7_10_1","doi-asserted-by":"publisher","DOI":"10.5858\/2010-0478-RAR.1"},{"key":"e_1_2_7_11_1","doi-asserted-by":"publisher","DOI":"10.3390\/cancers12030602"},{"key":"e_1_2_7_12_1","doi-asserted-by":"publisher","DOI":"10.1097\/01.pas.0000131544.18266.a4"},{"key":"e_1_2_7_13_1","doi-asserted-by":"publisher","DOI":"10.1097\/01.pas.0000126759.43227.d9"}],"container-title":["Diagnostic Cytopathology"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/onlinelibrary.wiley.com\/doi\/pdf\/10.1002\/dc.70167","content-type":"application\/pdf","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/onlinelibrary.wiley.com\/doi\/full-xml\/10.1002\/dc.70167","content-type":"application\/xml","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/onlinelibrary.wiley.com\/doi\/pdf\/10.1002\/dc.70167","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2026,9,1]],"date-time":"2026-09-01T15:00:30Z","timestamp":1788274830000},"score":1,"resource":{"primary":{"URL":"https:\/\/onlinelibrary.wiley.com\/doi\/10.1002\/dc.70167"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2026,6,28]]},"references-count":12,"journal-issue":{"issue":"10","published-print":{"date-parts":[[2026,10]]}},"alternative-id":["10.1002\/dc.70167"],"URL":"https:\/\/doi.org\/10.1002\/dc.70167","archive":["Portico"],"relation":{},"ISSN":["8755-1039","1097-0339"],"issn-type":[{"value":"8755-1039","type":"print"},{"value":"1097-0339","type":"electronic"}],"subject":[],"published":{"date-parts":[[2026,6,28]]},"assertion":[{"value":"2026-02-27","order":0,"name":"received","label":"Received","group":{"name":"publication_history","label":"Publication History"}},{"value":"2026-06-22","order":2,"name":"accepted","label":"Accepted","group":{"name":"publication_history","label":"Publication History"}},{"value":"2026-06-28","order":3,"name":"published","label":"Published","group":{"name":"publication_history","label":"Publication History"}}]}}